. Electric railway journal . 9 Electric Railway Journal 455 Getting Better Economy in the Power House* Substantial Savings Are Possible, Particularly in the Boiler Room,Where in the Past Some Very Simple Expedients forFuel Saving Have Been Overlooked By G. H. KELSAY COAL is the source of power for practically all ourproperties. The United States possesses aboutone-half the coal supply of the world, sufficientto last us a period ranging from one hundred years tofour thousand years. The first period is for a consump-tion increasing at the present rate, but the coal willlast for thousand years at
. Electric railway journal . 9 Electric Railway Journal 455 Getting Better Economy in the Power House* Substantial Savings Are Possible, Particularly in the Boiler Room,Where in the Past Some Very Simple Expedients forFuel Saving Have Been Overlooked By G. H. KELSAY COAL is the source of power for practically all ourproperties. The United States possesses aboutone-half the coal supply of the world, sufficientto last us a period ranging from one hundred years tofour thousand years. The first period is for a consump-tion increasing at the present rate, but the coal willlast for thousand years at the present annual consump-tion. We have used to date about one-half per centof this, as is shown graphically in Fig. 1. One pound of coal of 11,000 heat units () hasstored in it, heat energy which if it could be changedto mechanical energy would lift a stout man ten milesor its own weight 2000 miles. If the energy in the coal 150 200 ISO 300 Per Cent. Boiler RatingCOMBINED EFFICIENCY OF BOILER, FURNACE AND ECONOMIZER. Years FIG. 1—RELATION OP BOILER LOAD TO EFFICIENCY,INCREASE IN EFFICIENCY OF STEAM TURBINES,AND RELATION OF COAL USED TOAVAILABLE SUPPLY could be converted directly to mechanical energy at thecar wheels, a motorman could easily carry enough coalin his cab to propel his car, and handling it would beno more of a burden than handling baggage. Heat Finds Many Stray Paths It is a duty of the operators in the mechanical andelectrical departments to make every reasonable effortto deliver energy to the car with the least possible loss,and the purpose of this paper is to call attention to someof the practices that affect the efficiency of this 2 shows in a graphical way how the energy in thecoal is consumed and what a small proportion is finallyavailable at the car. The named losses are unprevent-able, but they are all subject to decrease through in-telligent selection and operation of equipment. In one of its catalogs the Edge Moor Iron Company tOn
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